Restructure public side of gpu service.

mojo/services/public/interfaces/gpu/viewport_parameter_listener.mojom

Index: mojo/services/public/interfaces/gpu/viewport_parameter_listener.mojom
diff --git a/mojo/services/public/interfaces/gpu/viewport_parameter_listener.mojom b/mojo/services/public/interfaces/gpu/viewport_parameter_listener.mojom
deleted file mode 100644
index 5afa9313d3c557ebecaf39d5073a709e95c2be68..0000000000000000000000000000000000000000
--- a/mojo/services/public/interfaces/gpu/viewport_parameter_listener.mojom
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-module mojo;
-
-interface ViewportParameterListener {
-  // These parameters describe the refresh rate of the viewport. The viewport
-  // refreshes every |interval| time ticks. The phase of the refresh is
-  // indicated by |timebase|, which is synchronized with MojoGetTimeTicksNow.
-  OnVSyncParametersUpdated(int64 timebase, int64 interval);
-};